gigaset: linearize skb
The code of the Gigaset driver assumes that sk_buff-s coming from the ISDN4Linux subsystem are always linear. Explicitly calling skb_linearize() is cheap if they are, but much more robust in case they ever aren't. Impact: robustness improvement Signed-off-by: NTilman Schmidt <tilman@imap.cc> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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